New And Amended Accounting Standards And Interpretations And Changes To Accounting Policies - Summary of Retrospective Application of The Accounting Policy Change Has Resulted In The Adjustments in Consolidated Balance sheet (Detail) - USD ($) $ in Millions |
Jun. 30, 2021 |
Jun. 30, 2020 |
Jul. 01, 2019 |
Jul. 01, 2018 |
|---|---|---|---|---|
| Disclosure Of Detailed Information Of Retrospective Application Of Accounting Policy Change IAS Twelve [Line Items] | ||||
| Increase in Deferred tax liabilities | $ 3,314 | $ 3,779 | ||
| Increase in Goodwill (included within Intangible assets) | 1,197 | 1,197 | ||
| Decrease in Retained earnings | $ 46,779 | $ 43,396 | ||
| IAS Twelve [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member] | ||||
| Disclosure Of Detailed Information Of Retrospective Application Of Accounting Policy Change IAS Twelve [Line Items] | ||||
| Increase in Deferred tax liabilities | $ 1,021 | |||
| Increase in Goodwill (included within Intangible assets) | 950 | |||
| Decrease in Retained earnings | $ (71) | $ (71) |